6533b7d2fe1ef96bd125f590
RESEARCH PRODUCT
Integrating out strange quarks in ChPT
C. HaefeliMartin SchmidMikhail A. IvanovJürg Gassersubject
PhysicsNuclear and High Energy PhysicsStrange quarkParticle physicsChiral perturbation theory010308 nuclear & particles physicsHigh Energy Physics::LatticeFlavourNuclear TheoryHigh Energy Physics::PhenomenologyDown quarkFOS: Physical sciences01 natural sciencesHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)Quark star0103 physical sciencesUp quarkHigh Energy Physics::ExperimentLimit (mathematics)Perturbation theory (quantum mechanics)010306 general physicsdescription
We study three flavour chiral perturbation theory in a limit where the strange quark mass is much larger than the external momenta and the up and down quark masses, and where the external fields are those of two-flavour chiral perturbation theory. In this case, the theory reduces to the one of SU(2)_L x SU(2)_R. Through this reduction, one can work out the strange quark mass dependence of the LECs in the two-flavour case. We present the pertinent relations at two-loop order for F,B and l_i.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2007-06-07 |